﻿using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Globalization;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Security;


namespace MvcImage.Models
{

    public class ChangePasswordModel
    {
        [Required]
        [DataType(DataType.Password)]
        [Display(Name = "Current password")]
        public string OldPassword { get; set; }

        [Required]
        [StringLength(100, ErrorMessage = "The {0} must be at least {2} characters long.", MinimumLength = 6)]
        [DataType(DataType.Password)]
        [Display(Name = "New password")]
        public string NewPassword { get; set; }

        [DataType(DataType.Password)]
        [Display(Name = "Confirm new password")]
        [Compare("NewPassword", ErrorMessage = "The new password and confirmation password do not match.")]
        public string ConfirmPassword { get; set; }
    }

    public class LogOnModel
    {
        [Required]
        [Display(Name = "User name")]
        public string UserName { get; set; }

        [Required]
        [DataType(DataType.Password)]
        [Display(Name = "Password")]
        public string Password { get; set; }

        [Display(Name = "Remember me?")]
        public bool RememberMe { get; set; }
    }

    public class RegisterModel
    {
        [ScaffoldColumn(false)]
        public Guid UserId { get; set; }

        [Required]
        [Display(Name = "User name")]
        public string UserName { get; set; }

        [Required]
        [DataType(DataType.EmailAddress)]
        [Display(Name = "Email address")]
        public string Email { get; set; }

        [Required]
        [StringLength(100, ErrorMessage = "The {0} must be at least {2} characters long.", MinimumLength = 6)]
        [DataType(DataType.Password)]
        [Display(Name = "Password")]
        public string Password { get; set; }

        [DataType(DataType.Password)]
        [Display(Name = "Confirm password")]
        //[Compare("Password", ErrorMessage = "The password and confirmation password do not match.")]
        public string ConfirmPassword { get; set; }
    }
}


#region Services
// The FormsAuthentication type is sealed and contains static members, so it is difficult to
// unit test code that calls its members. The interface and helper class below demonstrate
// how to create an abstract wrapper around such a type in order to make the AccountController
// code unit testable.

public interface IMembershipService
{
    int MinPasswordLength { get; }

    bool ValidateUser(string userName, string password);
    MembershipCreateStatus CreateUser(string userName, string password, string email);
    MembershipCreateStatus CreateUser(string userName, string password, string email, Guid userId);
    bool ChangePassword(string userName, string oldPassword, string newPassword);
}

public class AccountMembershipService : IMembershipService
{
    private readonly MembershipProvider _provider;

    public AccountMembershipService()
        : this(null)
    {
    }

    public AccountMembershipService(MembershipProvider provider)
    {
        _provider = provider ?? Membership.Provider;

    }

    public int MinPasswordLength
    {
        get
        {
            return _provider.MinRequiredPasswordLength;
        }
    }

    public bool ValidateUser(string userName, string password)
    {
        if (String.IsNullOrEmpty(userName)) throw new ArgumentException("Value cannot be null or empty.", "userName");
        if (String.IsNullOrEmpty(password)) throw new ArgumentException("Value cannot be null or empty.", "password");

        return _provider.ValidateUser(userName, password);
    }

    public MembershipCreateStatus CreateUser(string userName, string password, string email)
    {
        if (String.IsNullOrEmpty(userName)) throw new ArgumentException("Value cannot be null or empty.", "userName");
        if (String.IsNullOrEmpty(password)) throw new ArgumentException("Value cannot be null or empty.", "password");
        if (String.IsNullOrEmpty(email)) throw new ArgumentException("Value cannot be null or empty.", "email");

        MembershipCreateStatus status;


        _provider.CreateUser(userName, password, email, null, null, true, null, out status);
        return status;
    }

    public MembershipCreateStatus CreateUser(string userName, string password, string email, Guid userId)
    {
        if (String.IsNullOrEmpty(userName)) throw new ArgumentException("Value cannot be null or empty.", "userName");
        if (String.IsNullOrEmpty(password)) throw new ArgumentException("Value cannot be null or empty.", "password");
        if (String.IsNullOrEmpty(email)) throw new ArgumentException("Value cannot be null or empty.", "email");

        MembershipCreateStatus status;


        _provider.CreateUser(userName, password, email, null, null, true, userId, out status);
        return status;
    }

    public bool ChangePassword(string userName, string oldPassword, string newPassword)
    {
        if (String.IsNullOrEmpty(userName)) throw new ArgumentException("Value cannot be null or empty.", "userName");
        if (String.IsNullOrEmpty(oldPassword)) throw new ArgumentException("Value cannot be null or empty.", "oldPassword");
        if (String.IsNullOrEmpty(newPassword)) throw new ArgumentException("Value cannot be null or empty.", "newPassword");

        // The underlying ChangePassword() will throw an exception rather
        // than return false in certain failure scenarios.
        try
        {
            MembershipUser currentUser = _provider.GetUser(userName, true /* userIsOnline */);
            return currentUser.ChangePassword(oldPassword, newPassword);
        }
        catch (ArgumentException)
        {
            return false;
        }
        catch (MembershipPasswordException)
        {
            return false;
        }
    }
}

public interface IFormsAuthenticationService
{
    void SignIn(string userName, bool createPersistentCookie);
    void SignOut();
}

public class FormsAuthenticationService : IFormsAuthenticationService
{
    public void SignIn(string userName, bool createPersistentCookie)
    {
        if (String.IsNullOrEmpty(userName)) throw new ArgumentException("Value cannot be null or empty.", "userName");


        FormsAuthentication.SetAuthCookie(userName, createPersistentCookie);
    }

    public void SignOut()
    {
        FormsAuthentication.SignOut();
    }
}
#endregion

#region Validation
public static class AccountValidation
{
    public static string ErrorCodeToString(MembershipCreateStatus createStatus)
    {
        // See http://go.microsoft.com/fwlink/?LinkID=177550 for
        // a full list of status codes.
        switch (createStatus)
        {
            case MembershipCreateStatus.DuplicateUserName:
                return "Username already exists. Please enter a different user name.";

            case MembershipCreateStatus.DuplicateEmail:
                return "A username for that e-mail address already exists. Please enter a different e-mail address.";

            case MembershipCreateStatus.InvalidPassword:
                return "The password provided is invalid. Please enter a valid password value.";

            case MembershipCreateStatus.InvalidEmail:
                return "The e-mail address provided is invalid. Please check the value and try again.";

            case MembershipCreateStatus.InvalidAnswer:
                return "The password retrieval answer provided is invalid. Please check the value and try again.";

            case MembershipCreateStatus.InvalidQuestion:
                return "The password retrieval question provided is invalid. Please check the value and try again.";

            case MembershipCreateStatus.InvalidUserName:
                return "The user name provided is invalid. Please check the value and try again.";

            case MembershipCreateStatus.ProviderError:
                return "The authentication provider returned an error. Please verify your entry and try again. If the problem persists, please contact your system administrator.";

            case MembershipCreateStatus.UserRejected:
                return "The user creation request has been canceled. Please verify your entry and try again. If the problem persists, please contact your system administrator.";

            default:
                return "An unknown error occurred. Please verify your entry and try again. If the problem persists, please contact your system administrator.";
        }
    }
}

[AttributeUsage(AttributeTargets.Class, AllowMultiple = true, Inherited = true)]
public sealed class PropertiesMustMatchAttribute : ValidationAttribute
{
    private const string _defaultErrorMessage = "'{0}' and '{1}' do not match.";
    private readonly object _typeId = new object();

    public PropertiesMustMatchAttribute(string originalProperty, string confirmProperty)
        : base(_defaultErrorMessage)
    {
        OriginalProperty = originalProperty;
        ConfirmProperty = confirmProperty;
    }

    public string ConfirmProperty { get; private set; }
    public string OriginalProperty { get; private set; }

    public override object TypeId
    {
        get
        {
            return _typeId;
        }
    }

    public override string FormatErrorMessage(string name)
    {
        return String.Format(CultureInfo.CurrentUICulture, ErrorMessageString,
            OriginalProperty, ConfirmProperty);
    }

    public override bool IsValid(object value)
    {
        PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(value);
        object originalValue = properties.Find(OriginalProperty, true /* ignoreCase */).GetValue(value);
        object confirmValue = properties.Find(ConfirmProperty, true /* ignoreCase */).GetValue(value);
        return Object.Equals(originalValue, confirmValue);
    }
}

[AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = true)]
public sealed class ValidatePasswordLengthAttribute : ValidationAttribute
{
    private const string _defaultErrorMessage = "'{0}' must be at least {1} characters long.";
    private readonly int _minCharacters = Membership.Provider.MinRequiredPasswordLength;

    public ValidatePasswordLengthAttribute()
        : base(_defaultErrorMessage)
    {
    }

    public override string FormatErrorMessage(string name)
    {
        return String.Format(CultureInfo.CurrentUICulture, ErrorMessageString,
            name, _minCharacters);
    }

    public override bool IsValid(object value)
    {
        string valueAsString = value as string;
        return (valueAsString != null && valueAsString.Length >= _minCharacters);
    }
}
#endregion

